*{
	padding: 0;
	margin: 0;
}
.aa{
	width: 520px;
	height: 280px;
	margin: 0 auto;
	position: relative;
}
.bb{
	list-style: none;
	width: 100%;
	height: 100%;
}
.bb>li{
	position: absolute;
	top: 0;
	left: 0;
}
.left-botton{
	border: 1px;
	background-color:#00000050 ;
	width: 30px;
	height: 70px;
	color: #ffffff;
	border-radius: 0 5px 5px 0;
	line-height: 70px;
	text-align: center;
	position: absolute;
	top:100px;
}
.right-botton{
	border: 1px;
	background-color:#00000050 ;
	width: 30px;
	height: 70px;
	color: #ffffff;
	border-radius: 5px 0 0 5px;
	line-height: 70px;
	text-align: center;
	position: absolute;
	top:100px;
	left: 490px;
}
.cc{
	position: absolute;
	top: 250px;
	left: 150px;
}
.cc>li{
	list-style: none;
	display: inline-block;
	border: 1px;
	width: 15px;
	height: 15px;
	border-radius: 20px;
	background-color: #FFFFFF;
	margin-left: 20px;
}
.cc>li:hover{
	background-color: red;
}
.bb>li:nth-child(1){
	z-index: 1;
}
.indexs{
	z-index: 100;
}
